Abstract: Disclosed are a stress-resistant, creep-resistant, high-temperature resistant and high-insulation sheath material for a maglev train cable, and a manufacturing method and use thereof. A multiple chemical crosslinking structure is constructed by blending a functional polyvinylsilicone grease with ultra-high molecular weight polyethylene (UHMWPE) and a ceramicized silicone rubber as a cable material matrix and using electron beam irradiation. In addition, organic/inorganic fillers in the matrix can form physical crosslinking points in the material. A physical-chemical dual crosslinking structure is constructed in the matrix, which can limit the motion and relaxation of molecular chains and improve the interaction between the insulation layer and sheath layer and refractory layers such as fillers and mica tapes to avoid the relative displacement during the laying and operation and improve the high-temperature resistance, creep resistance and stress relaxation resistance of a UHMWPE cable sheath material.

Abstract: Disclosed are liquid vinyl functionalized cage-type polyhedral oligomeric silsesquioxane modified by low-molecular-weight polysiloxane and a preparation method thereof. Under the catalytic action of tris(pentafluorophenyl)borane, cage-type octakis (dimethylsiloxy)-T8-silsesquioxane and hetero telechelic polydimethylsiloxane undergo a Piers-Rubinsztajn reaction, to obtain liquid Vi-POSS. Side chains of the liquid vinyl functionalized POSS in the present disclosure are Si—O—Si chain links, have better heat stability than that of common long-carbon-chain side chains, and contain vinyl functional groups capable of participating in chemical reactions, which not only have good mechanical enhancement and heat resistance properties, but also have chemical reactivity.

Abstract: The present invention provides a signal acquisition method and device of an azimuthal electromagnetic wave resistivity instrument while drilling. The method comprises: step 1. picking up, by a receiving antenna, a magnetic induction signal after formation attenuation, and converting the received magnetic induction signal into an electrical signal for subsequent circuit processing; step 2. amplifying, by a preamplifier circuit, the fixed gain of a weak signal with nV level amplitude induced on the receiving antenna; step 3. controlling a filtering circuit through a controller, and filtering the amplified signal, wherein the filtering circuit comprises an analog switch and two low pass filters with different frequencies, and for receiving signals with different frequencies, a field programmable gate array (FPGA) controller achieves the selection of the filtering frequency by controlling on/off of the analog switch; step 4. amplifying the filtered signal using a programmable amplifier circuit; and step 5.

Abstract: The invention discloses a medium combination for a rapid propagation medium for blueberry stem segment tissue, wherein the pre-culture medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising 0.1-0.5 mg/L IAA, 0.05-0.6 mg/L CPPU; the rapid culture medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising: 0.2-0.5 mg/L ZT; the seedling growth medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising: 0.1-2.0 mg/L 2-ip; and the rooting medium takes ½ MS medium as basis medium, comprising: 0.3-4.0 mg/L NAA. The invention further discloses a method of using the above medium combination to conduct rapid propagation of blueberry stem segment tissue, the propagation rate of this method is rapid.

Abstract: The invention provides a callus induction medium for blueberry tissue culture, it takes WPM medium as basic medium, comprises: 0.5-5.0 mg/L CPPU and 0.1-0.4 mg/L 2-ip. The present invention also provides a callus culture method of blueberry, the step thereof comprises: inoculating the blueberry explant into the above callus induction medium to conduct induction culture, to form blueberry callus. The present invention also discloses the medium combination and culture method to culture the above blueberry callus to blueberry tissue culture plant. For the above medium and culture method, the differentiation effect is good, efficiency is high, and can conduct continuous differentiation, and the effect to multiple varieties are all better.

Abstract: The invention discloses a medium combination for a rapid propagation medium for blueberry stein segment tissue, wherein the pre-culture medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising 0.1-0.5 mg/L IAA, 0.05-0.6 mg/L CPPU; the rapid culture medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising: 0.2-0.5 mg/L ZT; the seedling growth medium takes the MS medium containing 2-(N-morpholine) ethanesulfonic acid as basic medium, comprising: 0.1-2.0 mg/L 2-ip; and the rooting medium takes ½ MS medium as basis medium, comprising: 0.3-4.0 mg/L NAA. The invention further discloses a method of using the above medium combination to conduct rapid propagation of blueberry stein segment tissue, the propagation rate of this method is rapid.